2619561 has 16 divisors (see below), whose sum is σ = 4044800. Its totient is φ = 1477008.

The previous prime is 2619559. The next prime is 2619611. The reversal of 2619561 is 1659162.

It is not a de Polignac number, because 2619561 - 2¹ = 2619559 is a prime.

2619561 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2619521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 870 + ... + 2448.

It is an arithmetic number, because the mean of its divisors is an integer number (252800).

2^2619561 is an apocalyptic number.

2619561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2619561 is a deficient number, since it is larger than the sum of its proper divisors (1425239).

2619561 is a wasteful number, since it uses less digits than its factorization.

2619561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668.

The product of its digits is 3240, while the sum is 30.

The square root of 2619561 is about 1618.5057923900. The cubic root of 2619561 is about 137.8508680918.

The spelling of 2619561 in words is "two million, six hundred nineteen thousand, five hundred sixty-one".